+/* XXX: Copyright/license blurb needed here */
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <cairo.h>
#include <cairo-ft.h>
-#include <cgic.h>
+
#ifndef CAIRO_HAS_PNG_FUNCTIONS
#error This program requires cairo with PNG support
#endif
+
#include <ft2build.h>
#include FT_FREETYPE_H
#define TRUE (1==1)
#define FALSE (!TRUE)
-static cairo_status_t
-stdio_write (void *closure, const unsigned char *data, unsigned int length);
-
-double
-get_max_width (cairo_t *cr, char *characters);
-
-double
-get_max_height (cairo_t *cr, char *characters);
-
-void
-out_stroke (cairo_t *cr)
+static double
+get_max_width (cairo_t *cr, const char *characters, int num_characters)
{
-
+ int i;
+ double max_width = 0.;
+ char string[2];
+ string[1] = '\0';
+ for (i = 0; i < num_characters; i++) {
+ cairo_text_extents_t extents;
+ string[0] = characters[i];
+ cairo_text_extents (cr, string, &extents);
+ if ((extents.width + (extents.x_bearing * 2)) > max_width)
+ max_width = extents.width + (extents.x_bearing * 2);
+ }
+ return max_width;
}
-int
-cgiMain ()
+static double
+get_max_height (cairo_t *cr, const char *characters, int num_characters)
{
- char outputJson = FALSE;
-
- char characters[] = {
- '!', '"', '#', '$', '%', '&','\'', '(',
- ')', '*', '+', ',', '-', '.', '/', '0',
- '1', '2', '3', '4', '5', '6', '7', '8',
- '9', ':', ';', '<', '=', '>', '?', '@',
- 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
- 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
- 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
- 'Y', 'Z', '[','\\', ']', '^', '_', '`',
- 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
- 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
- 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
- 'y', 'z', '{', '|', '}', '~'
- };
-
int i;
+ double max_height = 0.;
+ char string[2];
+ string[1] = '\0';
+ for (i = 0; i < num_characters; i++) {
+ cairo_text_extents_t extents;
+ string[0] = characters[i];
+ cairo_text_extents (cr, string, &extents);
+ if ((extents.height) > max_height)
+ max_height = extents.height;
+ }
+ return max_height;
+}
+typedef struct {
+ char *family;
+ double size;
+ struct {
+ double red;
+ double green;
+ double blue;
+ } color;
+} args_t;
+
+static void
+parse_args (args_t *args)
+{
+ /* First some defaults */
+ args->family = "Vera";
+ args->size = 40;
+ args->color.red = 0.0;
+ args->color.green = 0.3;
+ args->color.blue = 0.0;
+
+ /* XXX: Next, we should override the defaults based on
+ * command-line arguments. */
+
+ /* XXX: Finally, we'll want to allow CGI-based arguments as
+ * well. */
+#if USE_CGIG
/* QueryString */
- char fontname[20];
int fontsize;
char format[5];
char fillcolor[20];
+ char fontname[20];
cgiFormStringNoNewlines("fontname", fontname, 20);
cgiFormInteger("fontsize", &fontsize, 50);
cgiFormStringNoNewlines("format", format, 5);
int fillcolor_green;
int fillcolor_blue;
sscanf (fillcolor, " rgb : %d , %d , %d ", &fillcolor_red, &fillcolor_green, &fillcolor_blue);
-
if ( format[0] == 'j' && format[1] == 's' && format[2] == 'o' && format[3] == 'n' )
- outputJson = TRUE;
+ outputJson = TRUE;
+#endif
+}
- if (outputJson)
- {
- cgiHeaderContentType("application/json");
- } else {
- cgiHeaderContentType("image/png");
- }
+static FT_Face
+load_ft_face_for_family (const char *family)
+{
+ /* XXX: Instead of a hard-coded filename here, we should really be
+ * taking family and using fontconfig to map that to a
+ * filename. */
+ const char font_filename[] = "./Vera.ttf";
- int error;
+ int error;
+ FT_Face ft_face;
FT_Library library;
- FT_Face ft_face;
- FT_Bool use_kerning;
- FT_UInt left_index, right_index;
- FT_Vector kerning;
error = FT_Init_FreeType( &library );
- if ( error )
- printf("error");
+ if ( error ) {
+ fprintf (stderr, "Fatal error initializing freetype.\n");
+ exit (1);
+ }
- error = FT_New_Face( library,"/srv/rdworth.org/cgi-bin/Verdana.ttf",
+ error = FT_New_Face( library, font_filename,
0,
&ft_face );
- if ( error == FT_Err_Unknown_File_Format )
- printf("File opened. Font format unsupported.");
- else if ( error )
- printf("Could not be open or read or broken.");
+ if ( error == FT_Err_Unknown_File_Format ) {
+ fprintf (stderr, "Unsupported font format: %s\n", font_filename);
+ exit (1);
+ } else if ( error ) {
+ fprintf (stderr, "Failed to open file: %s\n", font_filename);
+ exit (1);
+ }
- use_kerning = FT_HAS_KERNING( ft_face );
+ return ft_face;
+}
- /* Compute max-width and max-height */
+static void
+get_characters_max_width_height (FT_Face ft_face, double size,
+ const char *characters, int num_characters,
+ double *max_width, double *max_height)
+{
cairo_surface_t *surface;
cairo_t *cr;
cairo_font_face_t *cr_face;
cr = cairo_create (surface);
-/*
- cairo_select_font_face (cr, fontname,
- CAIRO_FONT_SLANT_NORMAL,
- CAIRO_FONT_WEIGHT_NORMAL);
-*/
cr_face = cairo_ft_font_face_create_for_ft_face (ft_face, 0);
cairo_set_font_face (cr, cr_face);
- cairo_set_font_size (cr, fontsize);
+ cairo_set_font_size (cr, size);
cairo_set_line_width (cr, 1.0);
- double max_width = get_max_width(cr, characters);
- double max_height = get_max_height(cr, characters);
+ *max_width = get_max_width(cr, characters, num_characters);
+ *max_height = get_max_height(cr, characters, num_characters);
cairo_font_face_destroy (cr_face);
cairo_destroy (cr);
cairo_surface_destroy(surface);
+}
- /* Draw */
- surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
- (max_width + 8) * 10,
- (max_height + 8) * 10);
-
- cr = cairo_create (surface);
+static void
+draw_character_table (cairo_t *cr,
+ FT_Face ft_face, double size,
+ const char *characters, int num_characters,
+ double character_width, double character_height)
+{
+ cairo_font_face_t *cr_face;
+ int i;
-/*
- cairo_select_font_face (cr, fontname,
- CAIRO_FONT_SLANT_NORMAL,
- CAIRO_FONT_WEIGHT_NORMAL);
-*/
cr_face = cairo_ft_font_face_create_for_ft_face (ft_face, 0);
cairo_set_font_face (cr, cr_face);
- cairo_set_font_size (cr, fontsize);
+ cairo_set_font_size (cr, size);
cairo_text_extents_t extents;
double x = 0.0;
double y = 0.0;
- if (outputJson)
- printf("{");
-
- cairo_translate (cr, 0, -(max_height / 2.50));
-
-// cairo_translate (cr, 0, -5.0);
-
char string[2];
string[1] = '\0';
- for (i = 0; i < ARRAY_SIZE(characters); i++)
- {
- if (i % 10 == 0)
- {
- x = 0.;
- y += max_height + 8;
- }
- string[0] = characters[i];
-
- cairo_text_extents (cr, string, &extents);
-
- if (outputJson)
- {
- if (i > 0)
- printf (",\n");
- printf ("u%i:{", characters[i]);
- printf ("x:%.1f,y:%.1f,w:%.1f,h:%.1f",
- x,
- y - (max_height * 1.15),
- extents.width + extents.x_bearing,
- extents.height);
- int j;
- for ( j = 0; j < ARRAY_SIZE(characters); j++ )
- {
- right_index = FT_Get_Char_Index( ft_face, characters[i] );
- left_index = FT_Get_Char_Index( ft_face, characters[j] );
-
- FT_Get_Kerning( ft_face, left_index, right_index,
- FT_KERNING_UNSCALED, &kerning );
-
- if ( kerning.x )
- printf(",k%d:%d", characters[j], kerning.x);
- }
-
- printf ("}");
- }
-
- x -= extents.x_bearing;
-
- cairo_move_to (cr, x, y);
- cairo_set_source_rgb (cr, 0., 0., 0.); // black
- if ( 0 <= fillcolor_red && fillcolor_red <= 255.0
- && 0 <= fillcolor_green && fillcolor_green <= 255.0
- && 0 <= fillcolor_blue && fillcolor_blue <= 255.0 )
- cairo_set_source_rgb (cr, fillcolor_red / 255.0, fillcolor_green / 255.0, fillcolor_blue / 255.0);
- cairo_text_path (cr, string);
- cairo_fill (cr);
-
- x += extents.x_bearing;
- x += max_width + 8;
- }
-
-/*
- int thick_width = 4;
- int thin_width = 0;
- for (c = 'A'; c <= 'I'; c++)
+ cairo_set_line_width (cr, 2.0);
+ for (i = 0; i < num_characters; i++)
{
- string[0] = c;
- int spacing = ((c - 'A') * letterspacing) + 1;
-
-
- cairo_save(cr);
-
- cairo_move_to (cr, spacing, 0);
- cairo_text_path (cr, string);
-// cairo_set_source_rgb (cr, 0.1, 0.2, 0.2); // gray
- cairo_set_source_rgb (cr, 0.8, 0.8, 0.85); // silver
- cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+ cairo_rectangle (cr, x, y, character_width, character_height);
+ cairo_stroke_preserve (cr);
+ cairo_save (cr);
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
+ cairo_fill (cr);
+ cairo_restore (cr);
+
+ string[0] = characters[i];
+
+ cairo_text_extents (cr, string, &extents);
+
+ cairo_move_to (cr, x - extents.x_bearing, y - extents.y_bearing);
+ cairo_show_text (cr, string);
+
+ if ((i+1) % 10 == 0)
+ {
+ x = 0.;
+ y += character_height;
+ } else {
+ x += character_width;
+ }
+ }
- cairo_push_group (cr);
- cairo_set_line_width (cr, thick_width);
- cairo_stroke_preserve (cr);
- cairo_set_line_width (cr, thin_width);
- cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
- cairo_stroke_preserve (cr);
- cairo_fill (cr);
- cairo_pop_group_to_source (cr);
+ cairo_scale (cr, 1, -1);
+ cairo_push_group (cr);
+}
- cairo_paint (cr);
+int
+main (void)
+{
+ char characters[] = {
+ '!', '"', '#', '$', '%', '&','\'', '(',
+ ')', '*', '+', ',', '-', '.', '/', '0',
+ '1', '2', '3', '4', '5', '6', '7', '8',
+ '9', ':', ';', '<', '=', '>', '?', '@',
+ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+ 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+ 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+ 'Y', 'Z', '[','\\', ']', '^', '_', '`',
+ 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
+ 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
+ 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
+ 'y', 'z', '{', '|', '}', '~'
+ };
- cairo_restore(cr);
+ args_t args;
+ FT_Face ft_face;
+ double max_width, max_height;
+ cairo_surface_t *surface;
+ cairo_t *cr;
- cairo_move_to (cr, spacing, 0);
- cairo_text_path (cr, string);
- cairo_set_source_rgb (cr, 0.4, 0.45, 0.7); // blue
+ parse_args (&args);
- cairo_fill (cr);
- }
-*/
+ ft_face = load_ft_face_for_family (args.family);
- cairo_scale (cr, 1, -1);
- cairo_push_group (cr);
-/*
+ get_characters_max_width_height (ft_face, args.size,
+ characters, ARRAY_SIZE (characters),
+ &max_width, &max_height);
- cairo_pattern_t *gradient;
-
- for (i = 0; i < 9; i++)
- {
- char c[2];
- strncpy(c, STRING + i, 1);
- c[1] = '\0';
- int spacing = (i * letterspacing) + 1;
- cairo_move_to (cr, spacing, -3);
- cairo_show_text (cr, c);
+ /* Draw */
+ surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
+ max_width * 10,
+ max_height * 10);
- }
- cairo_pop_group_to_source (cr);
+ cr = cairo_create (surface);
- gradient = cairo_pattern_create_linear (0, 0, 0, -fontsize);
- cairo_pattern_add_color_stop_rgba (gradient, 0.0, 1, 1, 1, 0.5);
- cairo_pattern_add_color_stop_rgba (gradient, 0.7, 1, 1, 1, 0.0);
+ cairo_set_source_rgb (cr,
+ args.color.red,
+ args.color.green,
+ args.color.blue);
- cairo_mask (cr, gradient);
+ draw_character_table (cr, ft_face, args.size,
+ characters, ARRAY_SIZE (characters),
+ max_width, max_height);
- cairo_pattern_destroy (gradient);
-*/
- if (outputJson)
- {
- printf("}");
- } else {
- cairo_surface_write_to_png_stream (surface, stdio_write, cgiOut);
- }
+ cairo_surface_write_to_png (surface, "spritext-output.png");
+ printf ("Result written to spritext-output.png\n");
cairo_destroy (cr);
return 0;
}
-
-static cairo_status_t
-stdio_write (void *closure, const unsigned char *data, unsigned int length)
-{
- FILE *file = closure;
- if (fwrite (data, 1, length, file) == length)
- return CAIRO_STATUS_SUCCESS;
- else
- return CAIRO_STATUS_WRITE_ERROR;
-}
-
-double
-get_max_width(cairo_t *cr, char *characters)
-{
- int i;
- double max_width = 0.;
- char string[2];
- string[1] = '\0';
- for (i = 0; i < ARRAY_SIZE(characters); i++) {
- cairo_text_extents_t extents;
- string[0] = characters[i];
- cairo_text_extents (cr, string, &extents);
- if ((extents.width + (extents.x_bearing * 2)) > max_width)
- max_width = extents.width + (extents.x_bearing * 2);
- }
- return max_width;
-}
-
-double
-get_max_height(cairo_t *cr, char *characters)
-{
- int i;
- double max_height = 0.;
- char string[2];
- string[1] = '\0';
- for (i = 0; i < ARRAY_SIZE(characters); i++) {
- cairo_text_extents_t extents;
- string[0] = characters[i];
- cairo_text_extents (cr, string, &extents);
-// if ((extents.height - extents.y_bearing) > max_height)
-// max_height = extents.height - extents.y_bearing;
- if ((extents.height) > max_height)
- max_height = extents.height;
- }
- return max_height;
-}
-
projects / spritext / blobdiff